Cushion-wheel and pump therefor.



W. L. OLMSTEAD. CUSHION WHEEL AND PUMP THBREFOR.

APPLICATION FILED DBG.14,1910. K j ,qgb Patented July 15,1913.

3 SHEETS-Smm" 1.

W. L. OLMSTEAD. UUSHION WHEEL AND PUMP THBREFOR. l APPLICATION I'ILEDDEC.14, 1910. gygggw Patented July 15, 1913.

3 SEEETS-SHEET 2.

w. Il. OLMSTEAD. CUSHION WHEEL AND PUMP THEREFOR. APPLOATION FILEDDEG.14, 1910.

1,067,439. Patented July 15, 1913.

.3 SHEETS-SHEET 3.'

'WILLArn oLMsTEAii, or REDLANDS, CALIFORNIA.

CUSHION-WHEEL AND PUMP THEREFOR.

Specification of Letters Patent.

Application inea Decemberie, 1910. sei-iai No. 597,234.

To @ZZ whom it may concern Be itknown that I, WILLIAM L.' OLM- s'rnan, acitizen of the United States, residing at Redlands, in the, county ofSan Bernardino and State of. California, have invented new and usefulImprovements in Cushion-VVheels and Pumps Therefor, of Which thefollowingjis a specification.

The invention relates to cushion Wheels, and more particularly to theclass of com bined cushion wheels and automatically opd erated air pumpstherefor.

The primary object of the invention is the provision of 'a wheel of thischaracter in which allshocks, and jarsincident to the travel of theWheel will be absorbed thereby, thus assuring the smooth travel of avehicle.-

Another object of the invention is the provision of a Wheel in which,the tire thereof is susceptible of yielding` when traveling upon anuneven surface, thus obviating shocks and jars to a vehicle incident tothe travel of the Wheel upon the uneven surface, thereby increasing thelife of the vehicle.

A further object of the invention is the provision of a Wheel in whichits tire Will be yieldably supported for absorbing 'shocks 'and jarswhen traveling upon an uneven surface, the tire being held under aircompression supplied to the .Wheel through the medium of a pump, thesame being automatically operated on therevolving of the Wheel.

A still further object of the invention is the provision of a Wheel ofthis character which obviates the necessity of the employment of arubber tire, yet possessesthe requisite strength, yieldingqualit-ies'an-d increases the durability thereof, thus giving themaximum lite' to the Wheel.

A still further object of the invention is the provision of' a Wheel ofthis character which is simple in construction, thoroughly* reliable andetiicient in operation,and'in expensive 1n manufact-ure.

`With these and other objects in view, the

invention consists in the construction, com.

binatio-n and arrangement oi' part-s, as will be hereinafter more fullydescribed, illustrated in tle accompanying drawings, and pointed out inthe claim hereunto appended.

ln the drawings: Figure 1 is a sideelevation of a Wheel constructed inaccordance with the invention, the same being slown p-.stly broken away.2 similar view, looking toward the opposite or inner i'ace of the Wesel.`Fig. 3 is a fragmentary vertical longitudinal sectional view through lPatented July 15,1913` ujf.,

the Wheel. Fig. 4 is a sectional vievvon the I i line -si of .Figa 1. Aview on the line 5-5 of Fig. 1. Fig. 6 is a the p u'mp cylinders and itspipe connection showing in detail the valve.

Similar reference. characters indicate cor-, responding parts throughoutthe several views of the drawings.

Fig. 5 is a sectional l.

sectional view on the line 6-G offFig.. 4. v, i F1g. 'l is a fragmentaryenlarged vertical.` longitudinal.sectional viewthroughone of Referringto the drawings by numerals,

the Wheel com iris-es a hub 10 the sainebeino'.l

l 7 es of the usual Wellgknotvn construction, and, 1,' formed from anysuitable material, andis held fixed centrally Within avholloW Acasing.Q.

11,. the same forming acompressed .l Chamber 12, and from the saidcasing y projectradial hollou spokes 13theffinner ends of the spokesbeing threaded intojthe casing 11 in any suitable.manner,fso aspto 'forma fluid tight juncture therebet-weeinv Fixed to the outer end of ,thespokes'13. Ais a rim 14, the same being of any desirablecon`Y struction,andthe outer ends offthe s pfOkQS- 13 are threaded in the said rim14,.,so aslrto; form a uid tight l1uncture therebetueeri.y

These spokes 13 are preferably ccnstructed,V

require. l, n I AConnected to the rim 14 is a flexible tire the innerends of Which are provided'with pist-on heads 17, While their outer endshavev4 detachably connected thereto presser heads .'{ecfgf 15, the samebeing preferablyA constructed from canvas or leather, although 1t may:be

or feet 18, the latterwvorling against the inner face of the tread'p'ortion of vthe tire' 15, and passed through these heads or feet- 18,isa flexible steel band 19, the latter extending entirely about the rimbetween it and the tread portion ot the tire 15j and Within'the latter.'y

Secured within thev spokes 13 medially of their length lare centeringrings 20, with which abut the sten heads 17 when the plunge-rs Ypresence ci compressed air Within the air tore-ed ,outwardly by the tiefrom metal, although the lsame bea` formed from any othersuitablematerial, 1.1, and also reinforced, 1t the occasion` `shouldchamber 12 formed by the casing 11 surrounding the hub of the wheel.ySurrounding each plunger 1G 1s a packing .21 which 'is held conipressedbetween the centering' rings 20 and the rim 14C by means of anadjust-able packing;` gland 22, the samei being suitably threaded in theouter end of the hollow spokes 1? and surrounds the said plungers 1G, sothat the latter will Work therethrough.

Mounted in the spokes 13 at spaced intervals, circinnferentially ot thesame, are suitable oil cups 23, which latter permit the feeding of oilinto the said spokes 13 for lubricating the piston heads 17 of theplungers 16 'working within the spokes.

Suitably mounted in the casing;` 11 is an automatic air exhaust yalyel2st, thus permitting' the exhaust ot excess compressed air from the airchamber 12 during the working ot the wheel.

Connected with the inner end of the hub is an vautomatic air pressurepump which comprises a yoke or frame 25, the same being' slidably fittedin guide members 26, and from diametrically opposite points of this'frame 25 and secured thereto are pistons 27, the same'working in pumpcylinders 2S suitably fixed exteriorly to the casing 11, the pumpcylinders 28 being in communica tion with the air chamber 12 py means ofpipes 29, so that air from the pump cylinders 28 may be delivereddirectly into said air chamber 12, whence itwill actupon the pistonheads '17, thus forcing' outwardly the plungers 16, thereby holding thetire 15 disV tended for use.

Formed on the axle 30, upon which the hub 1() of .the wheel revolves, isa cam 31, which operates alternately upon opposite ends of the yoke ortrame 25 upon the reyolution of the wheel, thereby reciprocating thepistons 27 in the pump cylinders 28 for compressing air into the airchamber 12 Within the hollow casing 11 of the wheel, thus the ytire 15ofthe wheel will be sustained distended :tor use during the continuityof revolution ot the wheel.

In practice it is to be understood that the chamber 12 at each airintake through the pipe 29 will be provided with a suitable Icheck valveand also that each pump cylinder will bevproyided with a suitable valvesuch as areV disclosed in the Swiss Patent, #1 -22,051, of 1901. Thecheck valve employed in each pump cylinder 'will auto-- matically closeon the compression stroke of the piston 27, so as to prevent the escapeof air from the cylinder 2S, thereby forcing the air into the chamber12. The check Valves arranged therein will. open to permit the ingressof air, but on the. reverse stroke will close to prevent the escape ofair there from.

From the foregoing, it is thoughtthat the construction and operation ofthe inrention will be clear and apparent, and therefore, a more extendedexplanation has been omitted.

It is to be understood that the invention. is not restricted to thedisclosure herein, because changes, yariations, and modifications arecontemplated in the structure, such as come properly within the scope ofthe appended claim. without departingfrom the spirit of the invention,or sacriticing any of its advantages.

that is claimed is:

The combination with a stationaryl axle, of a vehicle wheel having' ahollow hub rotatably mounted on the axle, guide members fixed to andprojecting outwardly from said hub at opposite sides of the axle. arectangular shaped frame slida'bly engaged in said guide members andsurrounding the axle, pipes engaged in the head for com municationtherewith and havingelbows arranged in alinement with each other, pumpcylinders disposed exteriorly o't the traine at one side of the hub andcarried by the elbow, diametrically opposed piston rods tixed to thetrame and haring piston heads working within the pump cylinder and a camformed on the axle and alternately enu gagreable with opposite sides otthe frame tor reciprocating` the latter.

In testimony whereof I athx my signature in presence ot two witnesses.

WHJLAM L. OLMSTEAD. Witnesses:

C. E. I'vnsox, J. M. CLEVELAND.

